Vehicle-brake.



0. H. BLOMSTROM.

Patented Dec. 17, 1912.

2' SHEET SSHEET 1.

Alumnus G. H. BLOMSTROM.

VEHICLE BRAKE. APPLIGAELQN-Plihfi MAR. 10, 1910.

,O4='7,6C)9 Patented. Dec. 17, 1912.

2 SH ETSAH EET 2v Amman:

UNITED STATES PATENT OFFICE.

CARL H. BLOMSTROM, OF ADRIAN, MICHIGAN, ASSIGNOR TO ROYAL EQUIPMENT COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION.

VEHICLE-BRAKE.

Specification of Letters .Patent.

Patented Dec. 17. 1912.

To all whom it may concern: 1 Be it known that I, CARL H. BLOMSTROM who am a citizen of the United States, residing at Adrian, county of Lenawee, State of Michigan, have invented a certain new and usefullmprovement in Vehicle-Brakes, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to'make and use the same, reference being had to the accompanying drawings, which form a part of this specification,

This invention relates to vehicle brakes, and has for its object an improved brake, in which the action of-the setting lever is aided by the frictional engagement between the brake strap and the wheel to which the strap is applied, this being true in whichever direction the Wheel be traveling at the time the brake is applied.

In the drawingsz-Figure 1, is a plan view, Fig. 2, is a side elevation; the brake strap is shown loose. Fig. 3, is a side elevation; the brake is applied with the wheel having lefthand rotation. Fig. 4, is a side elevation; the brake is applied with the wheel, having a righthand rotation.

Referring to the drawing, A designates the brake disk, and B the brake band provided' with the facing C. Qne end of said band is provided with eyes is to receive and support a pivot rod K. The other end of said band is provided with similar ears Z arranged to receive and support a pivot bolt L. 'Pivotally connected to the bolt 70 are links D, D, and similar links G, G are'pivoted to the bolt Z, said links being provided with longitudinal slots N and. M, respectively, to receive a supporting rod X. A lever E is also pivotally mounted on bolt 7c and provided at its free with a pivoted reach rod I. The bolt Z is provided with a transverse openings through which is passed the'threaded end of a draw bolt F, the. other end of said bolt being pivot-ally connected to lever E, as indicated at J. The bolt F extends between the links and is provided with suitable adjusting nuts H, H.

In practice, the operation of the brake is effected by changing the relative angular relation of the pivots K, J, and L. Assuming the wheel to be revolving to the left (Fig. 2) the end of band B carrying bolt F is slack and the rocking of lever E in the direction of the arrow tends to move the links D, D

away from support X until the ends of slots N engage said support and interrupt the movement. At 'the same time the tension on bolt causes the links G, vG to move in the opposite direction and maintain a'slaok relation with respect to the support X. In this manner the friction facing C of band B is brought into close engagement with the disk A, thereby producing a very eflicient braking action. If the disk is rotating in the opposite direction from that above described, a similar action takes place, the only difierence being that the strain is brought upon links G, G, and the tension on links D, D is relieved.

It will be no'tedthat by reason of the construction above described the slotted ends of the linksare at the top, thu'sp'ermitting oscillatlon at the rod X rather than at the ends of theband B, and consequently a manimuin play of draw bolt F is provided WhIGh insures a close engagement of the brake band with the disk A.

It will be observed that the shape of the lever E is such that the same is in effect a bell crank lever, the pivotal connection J of for the reason that less movements of the' rod I and screw F are necessary to operate the band B.

By providing the links with slots in their upper ends and pivoting both links on one anchor St'ai j'i, I secure,an additional advantags, in that provision is made for considerable variation in distance between the top of the drum and the anchor stud, thusdoing away with the necessity for longer links which require to be specially made, reducing the cost, and making it perfectly easy for the person attaching the brake, and permitting brakes to be used on machines and automobiles having a wide variation between the anchor stud and the top of the drum.

What I claim is A brake comprising a brake drum, a band, an anchor stud, links each having one end pivotally connected to one end of said band, the other end of each link being slotted longitudinally to receive said anchor stud, whereby the distance =between the brake drum and said stud may be varied a bell In testimony whereof, I sign this specificrank lever having one of its arms plvotally cation in the presence of two Witnesses. connected to one end of said band, an adjusting screw connecting said arm and the CARL BLOMSTROM' 5 other end of said band, and an operating rod Witnesses:

pivotally connected to the other arm of said VIRGINIA C. SPRATT,

bell crank lever. WILLIAM M, SWAN. 

